 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.ui;

 /**
  * Extension interface to <code>IPerspectiveListener</code> which adds support
  * for listening to perspective pre-deactivate events.
  * <p>
  * This interface may be implemented by clients.
  * </p>
  *
  * @see IPageService#addPerspectiveListener(IPerspectiveListener)
  * @see PerspectiveAdapter
  * @since 3.2
  *
  */
 public interface IPerspectiveListener4 extends IPerspectiveListener3 {
     /**
      * <p>
      * Notifies this listener that a perspective in the given page is about to
      * be deactivated.
      * </p>
      * <p>
      * Note: This does not have the ability to veto a perspective deactivation.
      * </p>
      *
      * @param page
      * the page containing the deactivated perspective
      * @param perspective
      * the perspective descriptor that was deactivated
      * @see IWorkbenchPage#setPerspective(IPerspectiveDescriptor)
      */
     public void perspectivePreDeactivate(IWorkbenchPage page,
             IPerspectiveDescriptor perspective);

 }

